1987 Ford Mustang stereo removal

See the four little holes (2 on each side) of the radio? It requires special tools to insert and release the catch. They can be bought at almost any auto parts store. You can also make them yourself out of metal clothes hanger. It's basically just a looped metal piece, you need 2 of them, since its looped each metal piece can inserti into the 2 holes on each side at once. Just push in the tools, then pull out radio.